A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 5985-01-182-7437
NSN 5905-00-064-1235
NSN 5990-00-186-2445
NSN 5990-01-160-6978
NSN 5835-00-198-4936
NSN 4140-01-508-3780
NSN 5975-00-779-3319
NSN 6240-00-372-4841
NSN 6240-01-633-9357
NSN 5855-00-832-9341
NSN 7035-01-276-0355
NSN 5915-01-586-7934